stitching negatives with a new lens

[giorgio di paolo]

I scan my negatives with a Fujifilm GFX100s. Until recently, I used a GF120 macro with an extension tube to go 1:1.

I have now changed the lens and use a Schneider Kreuznach PYRITE 4.5/90.

Of course, that lens does not transmit EXIF data to the camera.

So I defined the new lens in the PTGui lens database as best as i could.

When I load the images in PTGui, strange things happen (e.g., the Panorama window shows only a fraction of the image), and the stitching fails much more frequently in spite of the lens being of superior quality.

How do I solve this? What are the EXIF parameters I should load in the images to avoid the problem?

 Thanks, giorgio di paolo, NYC